The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Most-visited and most-photographed slot canyon in the American Southwest.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

A century-old cabin off of Highway 30 touts an unusual construction material: dinosaur bones.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

Native Americans built this circle of stones, which was used to predict astronomical events.

A 16th-century Andalusian palace.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

There’s a hidden military meme engraved on the World War II Memorial.

It was once the base for a series of domestic terror attacks.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

Washington's iconic carousel has a nice piece of Civil Rights history.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.